Effect of sodium sulfite on mast cell degranulation and oxidant stress

Christopher R. Collaco, Daniel J. Hochman, Randall M. Goldblum, Edward G. Brooks

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background: Sulfur dioxide is 1 of 6 environmental pollutants monitored by the Environmental Protection Agency. Its ability to induce bronchoconstriction is well documented. It is highly soluble, initially forming sulfite ions in solution. Sulfur oxides are important constituents of other pollutants, such as diesel exhaust and fine particulates. Objective: To investigate the cellular responses of sulfite on cultured mast cells (rat basophilic leukemia [RBL-2H3] cells) and human peripheral blood basophils. Methods: Sulfite-induced mast cell degranulation and intracellular production of reactive oxygen species were evaluated in the presence and absence of antioxidants and inhibitors of redox metabolism. Degranulation was determined using β-hexosaminidase, serotonin, and histamine release assays. Induction of intracellular reactive oxygen species generation was determined using the redox-sensitive dye 2′,7′-dichlorofluorescein diacetate. Results: Sodium sulfite induced degranulation and the generation of intracellular reactive oxygen species in RBL-2H3 cells. These responses were inhibited by the free radical scavenger tetramethylthiourea and the flavoenzyme inhibitor diphenyliodinium but not by depletion of extracellular calcium. Peripheral blood basophils also showed histamine release after exposure to sodium sulfite Conclusions: Sulfite, the aqueous ion of sulfur dioxide, induces cellular activation, leading to degranulation in mast cells through a non-IgE-dependent pathway. The response also differs from IgE-mediated degranulation in that it is insensitive to the influx of extracellular calcium. The putative pathway seems to rely on activation of the reduced form of nicotinamide adenine dinucleotide phosphate oxidase complex, leading to intracellular oxidative stress.

Original languageEnglish (US)
Pages (from-to)550-556
Number of pages7
JournalAnnals of Allergy, Asthma and Immunology
Volume96
Issue number4
StatePublished - Apr 2006

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Cell Degranulation
Sulfites
Oxidants
Mast Cells
Reactive Oxygen Species
Sulfur Dioxide
Basophils
Histamine Release
Oxidation-Reduction
Sulfur Oxides
Ions
Calcium
Vehicle Emissions
Hexosaminidases
United States Environmental Protection Agency
Environmental Pollutants
Free Radical Scavengers
Bronchoconstriction
NADP
Immunoglobulin E

ASJC Scopus subject areas

  • Immunology and Allergy

Cite this

Collaco, C. R., Hochman, D. J., Goldblum, R. M., & Brooks, E. G. (2006). Effect of sodium sulfite on mast cell degranulation and oxidant stress. Annals of Allergy, Asthma and Immunology, 96(4), 550-556.

Effect of sodium sulfite on mast cell degranulation and oxidant stress. / Collaco, Christopher R.; Hochman, Daniel J.; Goldblum, Randall M.; Brooks, Edward G.

In: Annals of Allergy, Asthma and Immunology, Vol. 96, No. 4, 04.2006, p. 550-556.

Research output: Contribution to journalArticle

Collaco, CR, Hochman, DJ, Goldblum, RM & Brooks, EG 2006, 'Effect of sodium sulfite on mast cell degranulation and oxidant stress', Annals of Allergy, Asthma and Immunology, vol. 96, no. 4, pp. 550-556.
Collaco CR, Hochman DJ, Goldblum RM, Brooks EG. Effect of sodium sulfite on mast cell degranulation and oxidant stress. Annals of Allergy, Asthma and Immunology. 2006 Apr;96(4):550-556.
Collaco, Christopher R. ; Hochman, Daniel J. ; Goldblum, Randall M. ; Brooks, Edward G. / Effect of sodium sulfite on mast cell degranulation and oxidant stress. In: Annals of Allergy, Asthma and Immunology. 2006 ; Vol. 96, No. 4. pp. 550-556.
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